In 2026, Royal Caribbean features a rotation of themed nights that varies by ship and itinerary length, with the most popular being the "70s Disco Inferno" street party held on the Royal Promenade. Other staples include "White Night" (where guests wear all white for a poolside deck party), "Caribbean Night" (featuring tropical attire), and the sophisticated "Formal Night" or "Dress to Impress," which occurs once or twice per sailing. For 2026 "event cruises" like the 80s Cruise or Star Trek: The Cruise on ships like Adventure of the Seas, the entire ship is transformed with neon nights and Klingon karaoke. For standard sailings, it is a high-value strategy to check the Royal Caribbean app or the "Cruise Compass" on your first day to see the specific schedule for your voyage, as theme nights are a core part of the onboard social experience where guests are encouraged to "go all out" with their costumes and outfits.